Nope the meta.json are just meta data for the indexes, dependencies and info that shows on the package system, lets do an example:
VAR: ddaamm.Megan.4.var
meta.json includes like i said just the reference as you can see:
View attachment 1293099
As you can see it has a "Saves/scene/ddaamm/Megan(A).json" lets take that for example:
View attachment 1293101
As you can see the morphs inside reference to other VARS and inside the VAR itself, so if you unpack it and delete it from the VAR the reference will be damaged and your scene wont be able to find the clothes, hairs, or morphs...